Homemade Stock Ticker tutorial

I am interested in trying to work with Python on the Onion, so I tried to walk through the "homemade stock ticker" tutorial in the projects section. I followed the instructions thoroughly but in the end could not reproduce the results of the project. Upon running a single instance of the code I received the following error:

It appears to me that there is some incompatibility with the JSON lib that the tutorial calls for importing. I loaded Python per the tutorial, but it looks like some additional step is necessary. Has anyone worked with this tutorial and gotten a different result?